Harry Potter uses gillyweed.
Harry Potter and the Goblet of Fire
"No One Asked Your Opinion, You Filthy Little Mudblood!"
Draco Malfoy
Harry practices the Patronus Charm on what type of creature in Professor Lupin's office?
A Boggart
The disarming charm, which forces whatever the opponent is holding to fly out of their hand.
Expelliarmus
What is the name of the most powerful love potion in the world that Professor Slughorn introduces the class to in his first lesson?
Amortentia
Harry Potter uses a spell to inflate Aunt Marge, and she floats away.
Harry Potter and the Prisoner of Azkaban
"Why spiders? Why couldn't it be 'follow the butterflies'?"
Ron Weasley
Which creature does Professor Lockhart introduce as part of his first Defense Against the Dark Arts lesson?
Cornish pixies
A spell that petrifies the opponent.
Petrificus Totalus
What is the formal name of "Liquid Luck"?
Fred and George open their joke shop, called Weasleys' Wizard Wheezes.
Harry Potter and the Half-Blood Prince
“All my shoes have mysteriously disappeared. I suspect the Nargles are behind it.”
Luna Lovegood
What type of creature is Aragog?
An Acromantula
The unlocking charm.
Alohomora
Which potion includes the following ingredients: stewed lacewing flies, leeches, fluxweed, knotgrass, powdered horn of a Bicorn, and shredded skin of a Boomslang?
Polyjuice Potion
Harry, Hermione, and Ron discover that Filch is a "Squib".
Harry Potter and the Chamber of Secrets
“I mean, it’s sort of exciting isn’t it? Breaking the rules.”
Hermione Granger
A Wrackspurt
The memory-altering spell.
Obliviate
What is the name of the truth serum?
Veritaserum
The Sorting Hat bursts into song, which only happens when the Hat feels like Hogwarts is in danger.
Harry Potter and the Order of the Phoenix
"Have you any idea how much tyrants fear the people they oppress? All of them realize that, one day, among their many victims, there is sure to be one who rises against them and strikes back!"
Albus Dumbledore
What type of creature grabs Harry's hand when he tries to take water from the lake to give to Professor Dumbledore in the Horcrux cave?
An Inferius
The spell that creates long, bloody slashes in the opponent, as if attacked by a sword.
Sectumsempra
Which potion includes the following ingredients: Sopophorous beans, wormwood infusion, valerian root, powdered asphodel root, sloth brain, and moondew?
Draught of Living Death